On Tue, 13 Oct 2020, Jeffrey Jonas via vcf-midatlantic wrote:

I'm no chemist but I've read that glycerin rejuvenates rubber. "AT-205 re-seal" is in auto parts stores. Audio deck chemical kits had rubber roller conditioner.

What's best?

I use TechSpray Rubber Roller Rejuvenator on my keypunch and LaserJet rollers. Mike Loewen mloewen@cpumagic.scol.pa.us Old Technology http://q7.neurotica.com/Oldtech/